De S-diesel-ratel

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Dangixxer
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De S-diesel-ratel

Berichtdoor Dangixxer » Wo Mei 20, 2009 13:47

Dit tegengekomen op MF
(en aangegezien het de laatste tijd "the talk of the town" is.....

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Eerste artikel

The Death rattle. It’s a story we’ve been following closely on MF since 2007 and a topic many of you have been extremely concerned about. Last year we posted a lengthy expose on the topic that you can read here. But for owners affected, this news will bring a huge sigh of relief.

For a bit of background on the issue, here’s a description of the issue we posted last year:

The cold start issue has been a common theme popping up in the Faults and Fixes threads on various MINI forums. Specifically, MCS owners complaining about a peculiarly loud engine rattle on start-up. Now the R56 is an “interesting” sounding engine to begin with. The direct fuel injection solenoids give the car a very diesel-esque sound at idle. But this is a very different sound altogether.

BMW has determined that the cold start rattle was/is being caused by the timing chain tensioner (which is in turn powered by an oil-pressurized piston). More specifically the sound is caused when the tensioner piston doesn’t extend all the way (or at all) which then allows the timing chain to come in contact with the guides on the engine cover.

After two years of research into the issue MINI now has official repair information at dealers that will eliminate the issue. The PuMA measure number that will need to be referenced is 10686850-13 (we’ve seen 10686850-12 mentioned but we believe 13 is the latest) and the part number is 11.31.7.598.956. According to the information we’ve seen, all cars affected in with the issue will get a new timing chain, chain guides, cam sprockets and VANOS unit.

At this stage MINI is handling this on a case by case basis when the owner complains about the sound. We’re guessing they would like to steer clear of something along the lines of a recall (voluntary or otherwise) due to the cost of the service. However don’t be surprised to see and hear more about this issue and the official fix soon.

In the mean time if your 2007-2009 MCS is affected we’d urge you to call and make an appointment at your local dealer.




Tweede artikel

Since our story last week on the 2007-2009 Cooper S cold start issues we’ve had loads of emails asking some basic questions on the issue and the fix. So in an effort to clear up some of the confusion, here’s the inside info into getting this fix applied to your 2007+ MCS.

First up the PuMA reference we used earlier is simply BMW speak or a file created to track the problems on one specific vehicle. The actual reference number for the timing chain rattle problem is SIM-11-02-07. This file provides information to the service advisor and repair tech for diagnosis, parts required, repair procedures, and warranty reporting requirements.

The first section of the SIM-11-02-07 document deals with verifying the timing chain rattle is occurring and not due to other potential issues.

Once confirmed, the old tensioner piston is removed and the new one inserted with the locking nut backed fully off. The piston is then torqued to a specfic value, the locking nut finger-tightened to the block, then the entire assembly removed. If the measured distance from the tip of the piston to the lock nut is 68 mm or greater, the timing chain, guides, rails, crankshaft sprocket, and camshaft bolts are replaced.

SIM 11-02-07 specifically states to not replace the camshaft sprocket or the Vanos unit unless other problems are observed. BMW engineering personnel must approve each case of the complete part replacement, but based on our sources, so far approval has been granted in all cases.

Based on comments we’ve received from readers, dealerships and service advisors are now becoming more helpful with this process. However as most MF readers know, it’s always helpful to understand what the process is and what is actually being fixed. So with that in mind it might be helpful to have this information in hand when talking with your service advisor.

Have you had your cold start issue fixed? Not all cars have the issue but enough have that we’re guessing there are quite a few stories out there of MF readers going through this process. If so let us know how it’s gone and what advice you have for other owners.

Thanks to MF reader Dick Mason for contributing to this article.

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Stafke
MINI Master
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Lid geworden op: 29 Dec 2007
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Berichtdoor Stafke » Do Mei 21, 2009 9:52

Dit ga ik eens afdrukken en meenemen naar de garage ....

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Dangixxer
MINI Nutter
Berichten: 5219
Lid geworden op: 10 Jan 2005
Contact:

Berichtdoor Dangixxer » Do Mei 21, 2009 13:47

Stafke schreef:Dit ga ik eens afdrukken en meenemen naar de garage ....


Het is ook daarvoor dat ik het hier gezet had :wink:

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Dangixxer
MINI Nutter
Berichten: 5219
Lid geworden op: 10 Jan 2005
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Berichtdoor Dangixxer » Vr Jan 15, 2010 23:14



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